What digit does not exist in Roman Numerals?

More Questions:

What thin cotton fabric used in summer suits takes its name from Persian words for "milk and sugar"?

What is the maximum possible break in snooker?

What is the official language of Austria?

What Christian feast celebrates "tongues of fire" descending on the Apostles?

Which goddess started the Trojan War?

Who spent months rehearsing for "My Fair Lady" then had most of her singing dubbed by Marni Nixon?

In what city would you find Charles River Esplanade?

What actress starred simultaneously on "Dynasty" and "T.J. Hooker" during the early 1980s?

What Clint Eastwood film was loosely inspired by the 1960's serial killer known as the Zodiac Killer?

What short-lived 1970s TV series was set on Moonbase Alpha?

Where was South Africa's Freedom Charter signed?

Who did Bill Clinton defeat in the 1996 US Presidential election?

In what year was the US Social Security Act signed into law?

What country was the first to send an object to the Moon?

Eirene was the Greek goddess of what?